The 2018-S Block Island Quarter is worth anywhere from $1 to $3 in typical circulated condition, but Proof examples — especially Deep Cameo strikes — can fetch $10 to $30 or more depending on grade and eye appeal. If you found one in your change jar or inherited a coin collection, you’re in the right place to find out exactly what it’s worth.
What Is the 2018-S Block Island Quarter?
The 2018-S Block Island Quarter is part of the America the Beautiful Quarters program, a series launched by the U.S. Mint in 2010 to honor national parks and other landmarks across the country. Block Island National Wildlife Refuge, located in Rhode Island, was featured as one of the five designs released in 2018.
The “S” mintmark tells you this coin was struck at the San Francisco Mint — and that’s an important detail. San Francisco does not produce coins for general circulation. Instead, the SF Mint focuses almost entirely on Proof coins made for collectors. So if you have a 2018-S Block Island Quarter, it almost certainly came from a Proof set rather than showing up in everyday pocket change. That already makes it a bit more special than your average quarter.
If you’re not sure what mintmark your coin carries or you want to identify it more precisely, using the best coin identifier app can help you confirm the exact variety and grade within seconds using your smartphone camera.
How Much Is the 2018-S Block Island Quarter Worth?
The value depends primarily on whether you have a standard Proof or a Silver Proof, and what grade it receives. Most 2018-S quarters are struck in clad (copper-nickel) composition, but silver versions were also produced for premium collector sets.
Here’s a simple breakdown of current market values:
| Type | Condition | Estimated Value |
|---|---|---|
| Clad Proof | PR65 | $2 – $5 |
| Clad Proof Deep Cameo | PR69 DCAM | $8 – $20 |
| Silver Proof | PR65 | $10 – $18 |
| Silver Proof Deep Cameo | PR70 DCAM | $25 – $40+ |
For up-to-date certified coin pricing, you can check current America the Beautiful Quarter price data from the CoinHix database, which tracks real market trends across grades.
Clad vs. Silver — Does It Matter for the 2018-S Block Island Quarter?
Yes, it matters quite a bit. The clad version is composed of an outer layer of nickel bonded to a copper core — this is the standard composition used for most modern U.S. quarters. The silver version, by contrast, is 90% silver and was sold exclusively through the U.S. Mint’s Silver Proof Set offerings.
Silver Proof versions are worth more for two reasons: the intrinsic metal value and the collector premium. With silver prices fluctuating, a 90% silver quarter contains roughly 0.1808 troy ounces of silver, which at $25 per ounce translates to about $4.50 in melt value alone — but collector demand pushes certified examples well above melt.
To tell them apart, check the coin’s edge. A silver quarter will show a solid silver-white edge, while a clad quarter reveals a copper-colored stripe along the rim. You can also look up your coin’s full value history on this detailed 2018 quarter value guide, which breaks down pricing by type and condition.
How Condition and Grading Affect the 2018-S Block Island Quarter Value
Coin grading is the single biggest factor determining what any Proof coin sells for. The Sheldon scale runs from 1 to 70, and Proof coins are graded separately using designations like PR65 (a solid, attractive Proof) up to the coveted PR70 DCAM (a perfect Deep Cameo Proof with no visible flaws under magnification).
Most 2018-S Block Island Quarters pulled straight from original Mint packaging grade out at PR68 or PR69 DCAM, which makes them attractive to collectors but still very accessible. A professionally graded PR70 DCAM from NGC or PCGS can command a meaningful premium over raw, ungraded examples.
If you’re serious about getting accurate values for multiple coins in your collection, CoinHix is an excellent tool to have on your phone. CoinHix lets you look up certified coin prices across thousands of U.S. coin types and dates, including the entire America the Beautiful series, so you always have real-time market data at your fingertips.
Is the 2018-S Block Island Quarter Rare?
Not especially rare in an absolute sense — the U.S. Mint produced hundreds of thousands of these coins for collector sets. However, relative to circulation coins, they are far less common because most people who bought Proof sets keep them intact. Coins that have been professionally graded at PR70 DCAM are scarcer by comparison, and those are the ones that bring higher prices at auction.
For most people who find a 2018-S Block Island Quarter, the value sits between $2 and $20 depending on condition and whether it’s silver or clad. That’s not a life-changing sum, but it’s a genuinely collectible coin with a beautiful design that commemorates one of the smallest but most ecologically significant wildlife refuges in the United States.
If you want to quickly identify and value your entire coin jar in one sitting, CoinHix makes the process fast and reliable, giving you denomination, mintmark, composition, and estimated value all in one place.
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Frequently Asked Questions
Q: Where does the “S” mintmark on the 2018-S Block Island Quarter come from?
A: The “S” stands for San Francisco, where the U.S. Mint’s San Francisco facility is located. That mint produces Proof coins primarily for collectors rather than coins intended for everyday commerce, which is why 2018-S quarters are almost always Proof strikes.
Q: How can I tell if my 2018-S Block Island Quarter is silver or clad?
A: Look at the edge of the coin. A silver quarter will have a uniform silvery-white edge, while a clad quarter shows a thin copper stripe running through the middle of the edge. You can also use the original packaging if available — the Silver Proof Set label will clearly say “Silver.”
Q: Is it worth getting my 2018-S Block Island Quarter professionally graded?
A: It depends on what you think the coin grades at. If it appears to be a flawless PR70 DCAM, professional grading by NGC or PCGS could significantly increase its resale value. For most PR68 or PR69 examples, grading costs may outweigh the premium you’d gain, so it’s worth comparing raw versus graded prices before submitting.
